(19)
(11) EP 1 047 045 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.03.2001 Bulletin 2001/12

(43) Date of publication A2:
25.10.2000 Bulletin 2000/43

(21) Application number: 00303303.2

(22) Date of filing: 19.04.2000
(51) International Patent Classification (IPC)7: G10L 13/00, G10L 13/08, G10L 21/02
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 22.04.1999 JP 11541599

(71) Applicant: SONY CORPORATION
Tokyo (JP)

(72) Inventors:
  • Omori, Shiro
    Shinagawa-ku, Tokyo (JP)
  • Nishiguchi, Masayuki
    Shinagawa-ku, Tokyo (JP)

(74) Representative: Ayers, Martyn Lewis Stanley 
J.A. KEMP & CO. 14 South Square Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)

   


(54) Sound synthesizing apparatus and method


(57) In a sound synthesizer, a noise adder generates a noise signal having a frequency band of 3,400 to 4,600 Hz, adjusts the gain of the noise signal, and adds the gain-adjusted noise signal to an excitation source excW after being filled with zeros by a zero-filling circuit, thereby providing a wide-band excitation source excW which is rather flat. The signal gain is adjusted by determining a narrow-band excitation source or a power of the wide-band excitation source after being filled with zeros and fining the gain to the narrow-band excitation source or the power.









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